CASE 721G Tier 4B (final) Wheel Loader Service Repair Manual Instant Download

1
621G 721G Tier 4B (final) Wheel Loader
SERVICE MANUAL
Part number 51428265 2nd edition English
December 2017
2
SERVICE MANUAL 621G WHEEL LOADER XR-EH, NEW CAB
TIER4B NA, 621G WHEEL LOADER XT-EH, NEW CAB
TIER4B NA, 621G WHEEL LOADER ZBAR-EH, NEW CAB
TIER4B NA, 721G WHEEL LOADER XR-EH, NEW CAB
TIER4B NA, 721G WHEEL LOADER XT-EH, NEW CAB
TIER4B NA, 721G WHEEL LOADER ZBAR-EH, NEW CAB
TIER4B NA
51428265_EN 18/12/2017
EN
3
Link Product / Engine
Product Market Product Engine
621G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA North America F4HFE613WB002
621G WHEEL LOADER XT-EH, NEW CAB TIER4B NA North America F4HFE613WB002
621G WHEEL LOADER XR-EH, NEW CAB TIER4B NA North America F4HFE613WB002
721G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA North America F4HFE613TB001
721G WHEEL LOADER XT-EH, NEW CAB TIER4B NA North America F4HFE613TB001
721G WHEEL LOADER XR-EH, NEW CAB TIER4B NA North America F4HFE613TB001
51428265_EN 18/12/2017
4
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Contents INTRODUCTION Engine.....................
..................................................
................ 10 10.001 Engine and
crankcase . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 10.1 10.202 Air
cleaners and lines . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
10.2 10.500 Selective Catalytic Reduction (SCR)
exhaust treatment . . . . . . . . . . . . . . . .
. . . . . . . . . . . 10.3 10.400 Engine
cooling system . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
10.4 10.414 Fan and drive . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 10.5 10.310 Aftercooler. . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
10.6 10.304 Engine lubrication system . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . 10.7 Transmission...........................
..................................................
. 21 21.113 Powershift transmission . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 21.1 21.135 Powershift transmission
external controls. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. 21.2 21.105 Powershift transmission hydraulic
components . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . 21.3 21.155
Powershift transmission internal components. . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 21.4 21.109 Transmission
cooler and lines. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 21.5 21.700 Torque
converter . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
21.6 21.182 Differential . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . 21.7 Four-Wheel Drive
(4WD) system .....................................
............. 23 23.314 Drive shaft. . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 23.1 Front
axle system ......................................
................................. 25 25.100
Powered front axle . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
25.1 25.102 Front bevel gear set and
differential . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 25.2 25.108 Final drive hub, steering
knuckles, and shafts . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
25.3 Rear axle system.............................
...........................................
27 27.100 Powered rear axle. . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 27.1 27.106 Rear bevel gear set and
differential . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 27.2
51428265_EN 18/12/2017
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27.120 Planetary and final drives . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. 27.3 Brakes and controls .......................
.............................................
33 33.202 Hydraulic service brakes . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . 33.1 33.110 Parking brake or parking lock
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 33.2 Hydraulic systems....................
..................................................
. 35 35.000 Hydraulic systems. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . 35.1 35.300 Reservoir, cooler,
and filters. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 35.2 35.106 Variable
displacement pump . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 35.3 35.359 Main
control valve . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
35.4 35.357 Pilot system . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . 35.5 35.204 Remote
control valves . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
35.6 35.752 Hydraulic fan drive cooling system.
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
35.7 35.820 Hydraulic driven cooling fans . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. 35.8 35.355 Hydraulic hand control . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 35.9 35.701 Front loader arm
hydraulic system . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 35.10 35.723 Front loader bucket
hydraulic system . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . 35.11 35.734 Tool quick coupler hydraulic
system . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
35.12 Frames and ballasting ......................
...........................................
39 39.100 Frame . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 39.1 Steering.............
..................................................
...................... 41 41.101 Steering
control . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
41.1 41.200 Hydraulic control components. . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
41.2 41.216 Cylinders . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 41.3 41.910 Auxiliary
steering . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
41.4 Wheels.......................................
...............................................
44 44.511 Front wheels. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 44.1 44.520 Rear wheels . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . 44.2 Cab
climate control ..................................
................................... 50
51428265_EN 18/12/2017
7
50.200 Air conditioning. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . 50.1 Electrical systems.............
..................................................
........ 55 55.000 Electrical system . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 55.1 55.100 Harnesses
and connectors. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 55.2 55.015 Engine
control system. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
55.3 55.201 Engine starting system . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 55.4 55.301 Alternator. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . 55.5 55.302
Battery. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . 55.6 55.988 Selective Catalytic
Reduction (SCR) electrical system . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
55.7 55.989 Exhaust Gas Recirculation (EGR)
electrical system . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . 55.8 55.640
Electronic modules . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
55.9 55.024 Transmission control system . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
55.10 55.020 Transmission speed sensors. . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
55.11 55.022 Transmission temperature sensors .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
55.12 55.028 Transmission fluid sensors . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. 55.13
55.512 Cab controls. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . 55.415 Loader arm and bucket
control system . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
55.14 55.15
55.530 Camera. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . .
55.16
55.DTC FAULT CODES . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . 55.17 Front loader and bucket.................
..............................................
82 82.100 Arm. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 82.1 82.300 Bucket
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . 82.2 Platform, cab, bodywork, and decals
.............................................
90 90.150 Cab . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 90.1
51428265_EN 18/12/2017
8
INTRODUCTION
51428265_EN 18/12/2017 1
9
INTRODUCTION
Safety rules
621G WHEEL LOADER XR-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER XT-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA NA
Personal safety This is the safety alert
symbol. It is used to alert you to potential
personal injury hazards. Obey all safety
messages that follow this symbol to avoid
possible death or injury.
Throughout this manual you will find the signal
words DANGER, WARNING, and CAUTION followed by
special in- structions. These precautions are
intended for the personal safety of you and those
working with you. Read and understand all the
safety messages in this manual before you operate
or service the machine.
DANGER indicates a hazardous situation that, if
not avoided, will result in death or serious
injury. WARNING indicates a hazardous situation
that, if not avoided, could result in death or
serious injury. CAUTION indicates a hazardous
situation that, if not avoided, could result in
minor or moderate injury.
FAILURE TO FOLLOW DANGER, WARNING, AND CAUTION
MESSAGES COULD RESULT IN DEATH OR SERIOUS
INJURY. Machine safety NOTICE Notice indicates
a situation that, if not avoided, could result in
machine or property damage. Throughout this
manual you will find the signal word Notice
followed by special instructions to prevent
machine or property damage. The word Notice is
used to address practices not related to personal
safety. Information NOTE Note indicates
additional information that clarifies steps,
procedures, or other information in this
manual. Throughout this manual you will find the
word Note followed by additional information
about a step, procedure, or other information in
the manual. The word Note is not intended to
address personal safety or property damage.
51428265_EN 18/12/2017 3
10
INTRODUCTION Personal safety Carefully read
this Manual before proceeding with main-
tenance, repairs, refuelling or other machine
operations. Repairs have to be carried out only
by authorized and in- structed staff specific
precautions have to be taken when grinding,
welding or when using mallets or heavy ham-
mers. Non-authorized persons are not allowed to
repair or carry out maintenance on this machine.
Do not carry out any work on the equipment
without prior authorization. Ask your employer
about the safety instructions in force and
safety equipment.
TULI12WEX2004AA 1
Nobody should be allowed in the cab during
machine maintenance unless he is a qualified
operator helping with the maintenance work. If
it is necessary to move the equipment to carry
out re- pairs or maintenance, do not lift or
lower the equipment from any other position than
the operators seat. Never carry out any
operation on the machine when the engine is
running, except when specifically
indicated. Stop the engine and ensure that all
pressure is relieved from hydraulic circuits
before removing caps, covers, valves, etc. All
repair and maintenance operations should be
carried out with the greatest care and
attention. Service stairs and platforms used in a
workshop or in the field should be built in
compliance with the safety rules in force.
TULI12WEX2005AA 2
Any functional disorders, especially those
affecting the safety of the machine, should
therefore be rectified im- mediately. DANGER Unex
pected movement! Make sure parking brake is
applied. Secure machine with wheel
chocks. Failure to comply will result in death or
serious injury. D0013A
Before performing any work on the machine, attach
a maintenance in progress tag. This tag can be
applied on the left-hand control lever, safety
lever or cab door.
51428265_EN 18/12/2017 4
11
INTRODUCTION Emergency Be prepared for
emergencies. Always keep a fire extin- guisher
and first aid kit readily available. Ensure that
the fire extinguisher is serviced in accordance
with the man- ufacturers instructions.
SMIL12WEX0174AA 3

• Equipment
• Wear close fitting clothing and safety equipment
  appropri- ate for the job
• Safety helmet
• Safety shoes
• Heavy gloves
• Reflective clothing
• Wet weather clothing
• If working conditions require, the following
  personal safety equipment should be on hand

• Respirators (or dust proof masks)
• Ear plugs or acoustic ears protections
• Goggles with lateral shield or masks for eye
  protection
• Do not wear rings, wristwatches, jewelry,
  unbuttoned or flapping clothing such as ties,
  torn clothes, scarves, open jackets or shirts
  with open zips which could get caught into
  moving parts.

TULI12WEX2008AA 4
Engine - Radiator Never leave the engine running
in enclosed spaces with- out proper ventilation
which is able to evacuate toxic ex- haust gases-
Keep the exhaust manifold and tube free from
combustible materials. Do not refuel with the
engine running, especially if hot, as this
increases fire hazard in case of fuel
spillage. Never attempt to check or adjust the
belts when the en- gine is running. Never
lubricate the machine with the engine running.
TULI12WEX2009AA 5
51428265_EN 18/12/2017 5
12
INTRODUCTION Pay attention to rotating
components and do not allow anyone to approach
these areas to avoid becoming en-
tangled. Hands, clothing or tools getting caught
in the fan blades or engine belts, can cause
amputations, violent hemorrages and generate
conditions of grave danger. For this reason
avoid touching or approaching all rotating or
moving parts. A surging spray of the coolant from
the radiator can cause serious burns and scalds.
Before checking the coolant level, shut-off the
engine and allow machine to cool down the
radiator and hoses. Slowly unscrew the cap to
release any residual pressure. If it is necessary
to remove the cap while engine is hot, wear
safety clothes and equipment, then loosen the cap
slowly to relieve the pressure gradually.
TULI12WEX2010AA 6
When checking the fuel, oil and coolant levels,
use lights and lamps explicitly designated as
explosion proof. If these types of lamps are not
used, fires or explosions may occur.
TULI12WEX2011AA 7
Hydraulic systems Jets of fluids under pressure
can penetrate the skin caus- ing serious
injuries. Avoid this hazard by relieving pressure
before disconnect- ing hydraulic or other
lines. Relieve the residual pressure by moving
the hydraulic control levers several
times. Tighten all connections before applying
pressure. To protect the eyes wear a facial
shield or safety goggles.
Protect your hands and body from possible jets of
fluids under pressure.
TULI12WEX2012AA 8
Swallowing hydraulic oil is a severe health
hazard.
51428265_EN 18/12/2017 6
13
INTRODUCTION When hydraulic oil has been
swallowed, avoid vomiting, but consult a doctor
or go to a hospital. If an accident occurs, see a
doctor familiar with this type of injury
immediately. Any fluid penetrating the skin must
be removed within a few hours to avoid serious
infections. Flammable splashes may originate
because of heating near lines with fluids under
pressure, resulting in serious burns. Do not
weld or use torches near lines containing fluids
or other flammable materials.
TULI12WEX2013AA 9
Lines under pressure can accidentally be pierced
when the heat expands beyond the area
immediately heated.
Arrange for temporary fire resistant shields to
protect hoses or other components during welding
or torch use. Have any visible leakage repaired
immediately. Discharged oil pollutes the
environment. Soak up any oil that has spilled
with a proper binding agent. Sweep up binding
agent and dispose of it separately from other
waste. Never search for leakages with fingers
instead, use a piece of cardboard and always
wear goggles. Never repair a damaged line
always replace it. Replace hydraulic hoses
immediately on detecting any damaged or moist
areas. Always store hydraulic oil in the original
containers.
51428265_EN 18/12/2017 7
14
INTRODUCTION Product identification Machine
components
LEIL17WHL1448FA1 1

1. Roll Over Protection System (ROPS) cab
2. Cab door handle
3. Timed disconnect switch and battery jump post
4. Battery access

1. Steps
2. Bucket (Z-bar version)
3. Loader lift arms
4. Bucket cylinder

51428265_EN 18/12/2017 24
15
INTRODUCTION
LEIL17WHL1447FA 2

1. Pre-cleaner
2. Sliding access panel
3. Cab side window
4. Driving lights

1. Bucket (Z-bar version)
2. Cab air filter door
3. Windshield washer reservoir
4. DIESEL EXHAUST FLUID (DEF)/ADBLUE fill tank

51428265_EN 18/12/2017 25
16
SERVICE MANUAL Engine 621G WHEEL LOADER XR-EH,
NEW CAB TIER4B NA, 621G WHEEL LOADER XT-EH, NEW
CAB TIER4B NA, 621G WHEEL LOADER ZBAR-EH, NEW CAB
TIER4B NA, 721G WHEEL LOADER XR-EH, NEW CAB
TIER4B NA, 721G WHEEL LOADER XT-EH, NEW CAB
TIER4B NA, 721G WHEEL LOADER ZBAR-EH, NEW CAB
TIER4B NA
51428265_EN 18/12/2017 10
17
Engine - Engine and crankcase
Engine - General specification
621G WHEEL LOADER XR-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER XT-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA NA
Engine with 4 Speed Transmission
A. Low idle 870 RPM to 930 RPM
Alternate low idle 670 RPM to 730 RPM
Alternate Accelerated Idle 1270 RPM to 1330 RPM
B. Maximum No Load RPM 2094 RPM to 2224 RPM
C. Converter Stall 1975 RPM to 2125 RPM
D. Hydraulic Stall 1895 RPM to 2205 RPM
E. Converter Hydraulic Stall 1455 RPM to 1765 RPM
Temperature of the torque converter oil 82 104 C (180 219 F)
Temperature of the hydraulic oil 54 57 C (129 135 F)
Engine with 5 Speed Transmission
A. Low idle 870 RPM to 930 RPM
Alternate low idle 670 RPM to 730 RPM
Alternate Accelerated Idle 1270 RPM to 1330 RPM
B. Maximum No Load RPM 2094 RPM to 2224 RPM
C. Converter Stall 2013 RPM to 2163 RPM
D. Hydraulic Stall 1950 RPM to 2150 RPM
E. Converter Hydraulic Stall 1559 RPM to 1759 RPM
Temperature of the torque converter oil 82 104 C (180 219 F)
Temperature of the hydraulic oil 54 57 C (129 135 F)
NOTE Hydraulic Stall and Converter Hydraulic
Stall RPM values are read while the lift arms are
rising with the bucket held rolled back and the
engine at Wide Open Throttle (WOT) in max power
mode with transmission in manual mode and in 3rd
gear.
Engine - General specification
721G WHEEL LOADER XR-EH, NEW CAB TIER4B NA NA
721G WHEEL LOADER XT-EH, NEW CAB TIER4B NA NA
721G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA NA
Engine with 4 Speed Transmission
A. Low idle 870 RPM to 930 RPM
Alternate low idle 670 RPM to 730 RPM
Alternate Accelerated Idle 1270 RPM to 1330 RPM
B. Maximum No Load RPM 2100 RPM to 2185 RPM
C. Converter Stall 1893 RPM to 2093 RPM
D. Hydraulic Stall 1923 RPM to 2123 RPM
E. Converter Hydraulic Stall 1500 RPM to 1700 RPM
Temperature of the torque converter oil 82 104 C (180 219 F)
Temperature of the hydraulic oil 54 57 C (129 135 F)
Engine with 5 Speed Transmission
A. Low idle 870 RPM to 930 RPM
Alternate low idle 670 RPM to 730 RPM
Alternate Accelerated Idle 1270 RPM to 1330 RPM
B. Maximum No Load RPM 2100 RPM to 2185 RPM
C. Converter Stall 1748 RPM to 1948 RPM
D. Hydraulic Stall 1987 RPM to 2187 RPM
E. Converter Hydraulic Stall 1413 RPM to 1613 RPM
Temperature of the torque converter oil 82 104 C (180 219 F)
Temperature of the hydraulic oil 54 57 C (129 135 F)
51428265_EN 18/12/2017 10.1 10.001 / 3
18
Engine - Engine and crankcase
NOTE Hydraulic Stall and Converter Hydraulic
Stall RPM values are read while the lift arms are
rising with the bucket held rolled back and the
engine at Wide Open Throttle (WOT) in max power
mode with transmission in manual mode and in 3rd
gear. Engine - General specification - Engine
Service Manual See below the part number of the
Engine FPT F4HFE613W and F4HFE613T Service
Manual. See the Engine Service Manual for more
details about the engine overhaul.
Language Engine Service Manual P/N
English 48076871
Engine - Engine horse power
621G WHEEL LOADER XR-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER XT-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA NA
Design characteristics Design characteristics
Displacement 6728 cm³ (410.6 in³)
Engine Configuration 6 cylinder in line, 4 stroke
Intake Air Turbocharged, 4 valves/cyl
Fuel injection High pressure common rail
EGR No
Performance Performance
Altitude Capability 3000 m (9842.5 ft)
High Idle Speed 2212 RPM
Low Idle Speed 700 RPM
Rated Power 121 kW at 2000 RPM
Peak Torque 730 Nm at 1500 RPM
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19
Engine - Engine and crankcase
LEIL17WHL0356GA 1
NOTE performances detected at engine test
bench. NOTE BSFC indicates the Brake Specific
Fuel Consumption.
Engine - Engine horse power
721G WHEEL LOADER XR-EH, NEW CAB TIER4B NA NA
721G WHEEL LOADER XT-EH, NEW CAB TIER4B NA NA
721G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA NA
Design characteristics Design characteristics
Displacement 6728 cm³ (410.6 in³)
Engine Configuration 6 cylinder in line, 4 stroke
Intake Air Turbocharged, 4 valves/cyl
Fuel injection High pressure common rail
EGR No
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20
Engine - Engine and crankcase
Performance Performance
Altitude Capability 3000 m (9842.5 ft)
High Idle Speed 2212 RPM
Low Idle Speed 700 RPM
Rated Power 145 kW at 2000 RPM
Peak Torque 950 Nm at 1300 RPM
LEIL17WHL0357GA 1
NOTE these are bench tested power / consumption
curves that of course can not reflect the daily
and specific use that each operator / business
owner makes of an earth moving machine. NOTE
BSFC indicates the Brake Specific Fuel
Consumption.
51428265_EN 18/12/2017 10.1 10.001 / 6
21
Engine - Engine and crankcase
Engine - Remove
621G WHEEL LOADER XR-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER XT-EH, NEW CAB TIER4B NA NA
621G WHEEL LOADER ZBAR-EH, NEW CAB TIER4B NA NA
NOTE emissions sensors mounted in the exhaust
stream are sensitive to extreme vibrations. Use
of tools that gen- erate extreme vibrations,
such as impact wrenches and hammers, will result
in damage to emission sensors. Avoid using these
tools during any service procedure in close
proximity of emission sensors. If the use of
these tools cannot be avoided, remove the
sensors using extreme caution prior to performing
any service procedure. 1. Park the machine on a
level surface and lower the bucket to the
ground. Put the articulation lock in LOCKED
position and stop the engine.
LEIL16WHL0048AB 1
2. Actuate the brake pedal several times to
discharge the brake accumulators.
LEIL15WHL0564AA 2
3. Put the key switch in ON position. Put the
control switch in ON position. Move the control
lever(s) back and forth at least 30 times to
release any pressure from the hydraulic circuit.
Put the key switch in OFF position.
LEIL17WHL1348AA 3
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22
Engine - Engine and crankcase
4. Raise the grill located above the cooler box
just behind the cab. Then slowly loosen the
hydraulic reservoir filler cap to release
pressure in the reservoir.
RCPH10WHL099BAL 4
5. Locate the timed disconnect switch and the
hood raise switch in the battery box. Raise the
engine hood and put the timed disconnect switch
in the OFF position.
RCPH10WHL106AAH 5
6. Unhook the rubber T-handle (1) and raise the
upper panel (2). Make sure that the security
levers are blocked.
LEIL13WHL0137AB 6
7. Raise both side panels (1). Then remove the
thumb screws (2) and inner fender panels
(3). NOTE righthand side of the machine is
shown. The op- eration is similar for the
lefthand side.
LEIL13WHL0612AB 7
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23
Engine - Engine and crankcase
8. Place a suitable container below the radiator
drain plug, remove the radiator cap and the
radiator drain plug (see the arrow in figure) to
drain the engine coolant. Reinstall the radiator
drain plug and the radiator cap after coolant
has drained. NOTE see machine specifications for
cooling system vol- ume.
LEIL16WHL0198AA 8
9. Place a suitable container below the engine
oil drain plug (see the arrow in figure). Remove
the engine oil drain plug and drain oil into
container. Reinstall the engine oil drain
plug. NOTE see machine specifications for engine
oil sump vol- ume.
LEIL16WHL0198AA 9
10. Remove the drain hose (1) from the frame
bracket (2).
LEIL16WHL1250AB 10
11. Double up a nylon lifting strap and slide
through the exhaust stack (1) on the engine hood.
LEIL14WHL0400AB 11
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24
Engine - Engine and crankcase
12. Place a solid steel bar or pipe through the
strap loop inside the engine hood and attach the
strap to a suit- able lifting device. Raise the
engine hood with the strap to release ten- sion
on the lifting motor.
RAPH12WEL0600AA 12
13. If machine is equipped with a rearview
camera, tag and disconnect the connector (1) of
the rearview cam- era wire harness (3). Cut the
wire ties (2) that hold the rearview camera wire
harness (3) to the rear grill.
LEIL16WHL0849AB 13
14. Cut the wire ties and remove the rearview
camera wire harness from the engine hood. Place
the rearview camera wire harness off to the side
in a safe location.
LEIL13WHL0140AB 14
15. Remove the engine hood wire harness clamp (1)
from the cooler housing. Tag and remove the
engine hood ground wire (2) from cooler housing.
LEIL13WHL0149AB 15
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25
Engine - Engine and crankcase
16. Tag and disconnect the engine hood wiring
harness connector (1) from the rear chassis
wiring harness connector. Remove the engine hood
wire harness clamp (2) from the fan guard.
LEIL13WHL0150AB 16
17. Have another person to balance the hood and
LOOSEN the hood hinge mounting bolts (see the
arrows in figure) from the cooler frame. NOTE do
not remove the engine hood hinge mounting bolts
at this time.
LEIL14WHL0401AB 17
18. Disconnect the wiring harness (5). Put the
timed disconnect switch in the ON position.
Retract the lifting motor cylinder (1) and remove
the clevis pin (3) and the cotter pin (4) from
the bottom of the lifting motor cylinder (1).
Separate the lifting motor cylinder (1) from the
hood support strut (2).
LEIL16WHL1837BB 18
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26
Engine - Engine and crankcase
19. Put the timed disconnect switch (1) in OFF
position. Remove the battery cover and
disconnect ground lead from the batteries (2).
RAPH12WEL0608AA 19
20. Have another person to balance the hood and
remove the hood hinge mounting bolts (see the
arrows in fig- ure) from the cooler frame.
LEIL14WHL0401AB 20
21. Carefully raise and remove the engine hood
from the machine. Lower the engine hood onto a
suitable plat- form and disconnect lifting
equipment from the ex- haust stack (1). NOTE
radiator overflow hose may interfere with
left-hand hood hinge movement and hood removal.
LEIL14WHL0400AB 21
22. Tag and disconnect the engine wiring harness
con- nector from the air filter restriction
switch.
LEIL16WHL0573AB 22
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27
Engine - Engine and crankcase
23. Tag and disconnect the engine wiring harness
con- nector from the air inlet humidity sensor
(1).
LEIL13WHL0143AB 23
24. Loosen the clamp (1) on the crankcase
ventilation hose (2) and disconnect the hose.
LEIL13WHL0144AB 24
25. Loosen the clamps on the turbocharger and air
filter housing. Remove the intake air hose (1).
Cover the turbocharger inlet to prevent debris
entry.
LEIL13WHL0145AB 25
26. Loosen the clamp from the elbow connected to
the turbocharger.
LEIL14WHL0203AB 26
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28
Engine - Engine and crankcase
27. Loosen the clamp on the hose at the after
cooler inlet and remove the tube.
LEIL13WHL0147AB 27
28. Loosen the clamp on the air inlet hose at the
air filter housing.
LEIL13WHL0148AB 28
29. Loosen the clamp (1) on the air inlet hose
(2) at the exhaust support bracket. Remove the
air inlet hose (2).
LEIL13WHL0151AB 29
30. Remove the securing bolts (1) with the
related wash- ers and nuts. Remove the bracket
(2) with the air filter (3) as an assembly.
LEIL15WHL0037AB 30
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29
Engine - Engine and crankcase
31. Remove the four mounting bolts from the belt
cover. Then remove the cover. NOTE after
removing the belt cover, remove the cover
mounting bracket from the left rear side of
machine frame.
LEIL16WHL1877AB 31
32. Remove the drive belt from the engine.
LEIL13WHL0155AB 32
33. If machine is equipped with the air
conditioning sys- tem, identify, tag, and
disconnect the engine wiring harness connectors
from the air compressor clutch connector (1) and
high pressure switch (2). Then re- move the
three mounting bolts (3) for the compressor and
carefully set it on the left battery cover.
LEIL13WHL0156AB 33
34. Tag and disconnect the wiring from the
alternator.
LEIL16WHL0693AB 34
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30
Engine - Engine and crankcase
35. Remove the return line of the SCR coolant.
LEIL16WHL0568AB 35
36. Tag and remove the wires from the starter
solenoid (1), the ground cable (2), and ground
strap (3) from the starter. NOTE move the
starter cables away from the engine.
LEIL16WHL0569AB 36
37. Remove the bolts securing the wiring harness
clamps to the engine.
LEIL16WHL0570AB 37
38. Remove the ground wires from the
engine. NOTE move the wiring harness away from
the engine.
LEIL16WHL0572AB 38
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31
Engine - Engine and crankcase
39. If the machine is so equipped, unplug the
engine block heater and set it aside.
LEIL15WHL0016AB 39
40. Loosen the clamp (see the arrow in figure)
and dis- connect the pipe.
LEIL15WHL0015AB 40
41. Loosen the clamps and remove the lower
coolant hose from the engine.
RAPH12WEL0629AA 41
42. Remove the radiator hose from the engine.
LEIL13WHL0159AB 42
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32
Engine - Engine and crankcase
43. Remove the return radiator hose (1) and the
engine coolant vent hose from the top of the
radiator.
LEIL13WHL0141AB 43
44. Remove the overflow tank of the engine
coolant.
LEIL16WHL0574AB 44
45. Remove the bracket of the overflow tank.
LEIL16WHL0575AB 45
46. Remove the cooling fan guard.
LEIL13WHL0160AB 46
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33
Engine - Engine and crankcase
47. Loosen the clamp (1) on the intake manifold
for the output hose of the after cooler. Loosen
the clamp (2) from the body of the DEF/ADBLUE
tank vent filter.
LEIL13WHL0613AA 47
48. Loosen the clamp on the after cooler, and
remove the output hose of the after cooler from
the machine.
LEIL13WHL0162AB 48
49. Tag and disconnect the fuel filter heater
wire (1) and the water sensor (2). Then drain
fuel filter and discon- nect the inlet (3) and
outlet (4) fuel lines from the fuel filter head.
Plug the lines and cap the fittings. Remove the
ground wire and the attachment bolt (5) of the
fuel filter head.
LEIL13WHL0163AB 49
50. Tag and remove the grid heater cable
(1). NOTE hold the rear nut with a second wrench
to prevent grid heater damage.
LEIL13WHL0164AB 50
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34
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35
Engine - Engine and crankcase
51. Remove wire harness support clamp.
LEIL16WHL0490AB 51
52. Remove the P-clamp and cut the cable ties by
the sup- ply module. Disconnect the end of the
jumper harness (near the supply module) from the
Diesel Oxidation Catalyst (DOC) support.
LEIL15WHL0034AB 52
53. Loosen the clamp (1) on the Diesel Oxidation
Catalyst (DOC).
LEIL14WHL0402AB 53
54. Tag and disconnect the connector (1).
LEIL13WHL0167AB 54
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36
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